55312313 has 4 divisors (see below), whose sum is σ = 63214080. Its totient is φ = 47410548.

The previous prime is 55312307. The next prime is 55312331. The reversal of 55312313 is 31321355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55312313 - 2⁴ = 55312297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55312393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3950873 + ... + 3950886.

It is an arithmetic number, because the mean of its divisors is an integer number (15803520).

Almost surely, 2^55312313 is an apocalyptic number.

It is an amenable number.

55312313 is a deficient number, since it is larger than the sum of its proper divisors (7901767).

55312313 is an equidigital number, since it uses as much as digits as its factorization.

55312313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7901766.

The product of its digits is 1350, while the sum is 23.

The square root of 55312313 is about 7437.2248184387. The cubic root of 55312313 is about 381.0137130153.

Adding to 55312313 its reverse (31321355), we get a palindrome (86633668).

The spelling of 55312313 in words is "fifty-five million, three hundred twelve thousand, three hundred thirteen".